The green triangle thing follows the mouse/your finger on mobile. Touching the edge moves you to the next room. Try and find room 10. After playing around, I'm pretty sure there is only one way to get to it.
I am making a kind of labyrinth game, and this is it so far. I am only sharing this because its kinda cool - especially the fact that the rooms are always moving. The numbers in each room do not mean anything.